Climate Risk and the Federal Reserve's Supervisory Role

The Federal Reserve has moved climate-related financial risk from a peripheral concern into its core supervisory and financial stability frameworks. This page explains how the Fed defines climate risk in a banking context, the mechanisms through which supervisory pressure is applied, the scenarios where climate exposure becomes material to regulated institutions, and the boundaries that separate the Fed's supervisory authority from broader climate policy. Understanding this distinction is central to interpreting the Fed's actions in relation to the full scope of its regulatory mandate.

Definition and scope

Climate risk, as applied to the banking and financial system, divides into two distinct categories recognized by the Federal Reserve, the Basel Committee on Banking Supervision, and the Financial Stability Board (FSB):

1. Physical risk — Financial losses arising from acute climate events (floods, hurricanes, wildfires) or chronic shifts (sea-level rise, prolonged drought) that impair collateral values, disrupt borrower cash flows, or damage bank-owned infrastructure.
2. Transition risk — Losses stemming from the adjustment toward a lower-carbon economy, including changes in policy, technology adoption, or market sentiment that reduce asset values in carbon-intensive sectors.

The Federal Reserve's supervisory and regulatory role over the banking system treats both categories as sources of conventional financial risk — credit risk, market risk, liquidity risk, and operational risk — rather than as standalone environmental categories. The Federal Reserve's November 2023 Principles for Climate-Related Financial Risk Management for Large Financial Institutions apply to institutions with total consolidated assets exceeding $100 billion, establishing the threshold at which climate risk governance expectations become explicit supervisory requirements.

How it works

The Fed's supervisory approach to climate risk operates through existing examination and governance frameworks rather than through a separate climate-specific regulatory regime. The principal mechanisms include:

1. Board and management governance expectations — Large institutions are expected to incorporate climate risk into their internal governance structures, including board-level oversight and risk appetite statements.
2. Scenario analysis — The Fed has conducted exploratory climate scenario analysis exercises distinct from the stress tests used for capital adequacy under the Dodd-Frank Act. The 2023 Climate Scenario Analysis exercise engaged 6 of the largest U.S. bank holding companies, examining physical and transition risk exposure over a 10-year horizon.
3. Risk identification and measurement — Supervisors assess whether institutions have adequate data, modeling capacity, and internal controls to identify material climate-related concentrations in loan books, investment portfolios, and off-balance-sheet exposures.
4. Integration with existing capital and liquidity frameworks — Climate risk findings are incorporated into the Safety and Soundness examination process. No standalone climate capital surcharge exists under current Fed rules; findings translate into supervisory ratings and remediation requirements under existing frameworks.

The stress testing apparatus the Fed maintains for capital planning purposes remains legally and procedurally separate from climate scenario analysis, which carries no direct capital consequence as of the 2023 framework publication.

Common scenarios

Three operational scenarios illustrate how climate risk materializes inside a supervised institution's examination cycle:

Scenario A — Concentrated real estate exposure in a flood-prone corridor. A regional bank holding company holds a mortgage portfolio with 35% of its loans in coastal counties designated as high-risk by the Federal Emergency Management Agency (FEMA). Examiners flag the concentration as a potential physical risk factor, assess whether management has quantified the exposure using FEMA flood map data, and review whether insurance coverage and collateral valuations account for increasing flood frequency.

Scenario B — Energy sector credit concentration and transition risk. A large bank carries a material commercial lending portfolio to oil and gas exploration companies. Supervisors evaluate whether credit officers have modeled cash flow sensitivity under scenarios involving carbon pricing or accelerated regulatory tightening, consistent with the transition risk framework cited by the Financial Stability Board.

Scenario C — Operational risk from physical events. A bank's primary data center and two major branch facilities are located in a region with elevated wildfire risk. The operational risk examination evaluates whether business continuity planning addresses extended facility closures caused by smoke, evacuation orders, or infrastructure damage — a direct physical risk pathway to operational disruption.

Decision boundaries

A critical boundary separates the Fed's supervisory role from climate policy-making authority. The Fed has stated explicitly, including in the November 2023 principles, that its mandate does not extend to directing credit allocation toward or away from specific industries based on climate policy preferences. Supervisory action is bounded by financial safety and soundness; an institution's choice to lend to carbon-intensive sectors does not by itself constitute a supervisory deficiency absent a demonstrable risk management failure.

This boundary also distinguishes the Fed's approach from that of the European Central Bank (ECB), which has integrated climate stress testing into binding Supervisory Review and Evaluation Process (SREP) assessments with direct capital implications for supervised eurozone banks. The Fed's current framework is exploratory and governance-focused, not capital-binding.

The separation is also evident in jurisdictional design: the Federal Reserve's climate risk supervision applies to bank holding companies and state member banks under its consolidated supervisory authority, while the Office of the Comptroller of the Currency (OCC) and the Federal Deposit Insurance Corporation (FDIC) carry parallel climate risk guidance for national banks and state non-member banks respectively — producing a fragmented supervisory landscape across the 3 federal prudential banking regulators.